How to flatten a list in Python?
You can flatten a list in python using the following one-liner:
flat_list = [item for sublist in l for item in sublist]
In the example above, l
is the list of lists that is to be flattened.
The previous example can be rewritten to be more readable and will look like this:
flat_list = []
for sublist in l:
for item in sublist:
flat_list.append(item)
You can wrap this functionality into a function if you prefer:
def flatten(l):
return [item for sublist in l for item in sublist]
-
How can I safely create a nested directory in Python?
The most common way to safely create a nested directory in Python is using the pathlib or os modules. Using pathlib You can create a nested directory in python 3.5 or later using the Path and mkdir...
Questions -
What are metaclasses in Python?
In Python, a metaclass is the class of a class. It defines how a class behaves, including how it is created and how it manages its instances. A metaclass is defined by inheriting from the built-in ...
Questions -
How to access the index in for loops in Python?
In python, if you are enumerating over a list using the for loop, you can access the index of the current value by using enumerate function. my_list = [1,2,3,4,5,6,7,8,9,10] for index, value in enu...
Questions -
How to use the ternary conditional operator in Python?
The ternary conditional operator is a shortcut when writing simple conditional statements. If the condition is short and both true and false branches are short too, there is no need to use a multi-...
Questions
Make your mark
Join the writer's program
Are you a developer and love writing and sharing your knowledge with the world? Join our guest writing program and get paid for writing amazing technical guides. We'll get them to the right readers that will appreciate them.
Write for usBuild on top of Better Stack
Write a script, app or project on top of Better Stack and share it with the world. Make a public repository and share it with us at our email.
community@betterstack.comor submit a pull request and help us build better products for everyone.
See the full list of amazing projects on github